PRIMAAX
®
EX / PRIMAAX
®
for International Truck Vehicles
Component Replacement
58
17730-283
THE WEIGHT OF THE U-BEAM ASSEMBLY IS APPROXIMATELY 225 POUNDS. CARE SHOULD BE TAKEN
AT REMOVAL AND INSTALLATION TO PREVENT PERSONAL INJURY OR DAMAGE TO COMPONENTS.
7. Support
the
U-beam assembly at the cross tube with a floor jack or jackstand that is
equipped with a 4" contact plate.
8. Remove and discard the U-bolt fasteners from the clamp group.
9. Remove the top pad.
10. Inspect the top pad and the axle housing for any cracks or damage. Replace if necessary.
ASSEMBLY
1. Install the top pad on the top of the axle engaging the dowel pin. Care should be taken to
ensure the taller ear of the top pad is mounted to the inboard side of the suspension. The
top pad varies with different models and may appear different, see Figure 8-32.
FIGURE 8-32
2. Install the new U-bolts. Verify that the U-bolts are seated properly in the channels of the top
pad, see Figure 8-31.
3. Install the new U-bolt fasteners.
NOTE
U-bolt clamp group hardware for PRIMAAX EX / PRIMAAX suspensions are ¾"-16 UNF Grade C
locknuts and ¾"-16 UNF Grade 8 U-bolts which are phosphate and oil coated.
FIGURE 8-33
4. Tighten the U-bolt locknuts evenly in 50 foot pounds increments in the
proper pattern to achieve uniform bolt tension, see Figure 8-33.
5. Rap the top of the U-bolts with a dead blow mallet, and retighten to the
proper torque.
DO NOT
exceed specified torque on U-bolt locknuts.
Tighten the ¾" locknuts to 350-400 foot pounds torque.
6. Tighten the ¾" D-Pin bolts to 275-325 foot pounds torque if loos-
ened or removed during disassembly, see Figure 8-34.
FIGURE 8-34
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]
